# SDR AALA201911209044

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 13, 2019
- Submitted: November 20, 2019
- Operation: Air carrier
- Aircraft: [N543UW](https://openairdocs.org/aircraft/N543UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 4843
- Aircraft time: 27,438 hours, 10,958 cycles
- System (JASC): [3230 · Landing Gear Retraction/Extension System](https://openairdocs.org/jasc/3230)
- Part: Control Unit
- Part number: 801780288012
- Part serial: 807735
- Condition: Faulted
- Location: Mlg
- Part time: 27,438 hours, 10,958 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA201911209044

## Discrepancy

AIRCRAFT WAS GROUNDED: FLIGHT DIVERTED TO MIA AND DECLARED EMERGENCY DUE TO LANDING GEAR 1 FAULT INDICATION. MAINTENANCE FOUND POST FLT - LGCIU 1 & LLG (27GA) SENSOR FAULT. IAW TSM 32-31-00 AND AMM 32-31-73 REMOVED & REPLACED LLG CLOSED DOOR SENSOR (27GA) AND LGCIU-1 (5GA1). ALL OPS CHECKS NORMAL. (SEE SDR # AALA201911209055)

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